Eraser.



Patented Dec. 9. I902. B. J. DRISCOLL.

E R A S E R (Application filed Mar. 22, 1902.)

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NITED STATES PATENT OFFICE.

RICHARD J. DRISCOLL, OF TARRYTOWN, NEW YORK.

ERASER.

SPECIFICATION forming part of Letters Patent No. 715,646, dated December9, 1902.

Application filed March 22, 1902. Serial No. 99,425. (No model.)

7 inafter more fully described and claimed.

Referring to the accompanying drawings, which are made a part hereof,and on which similar reference characters indicate similar parts, Figure1 is a side elevation of one of my improved erasers, the knife beingshown as extended. Fig. 2 is a longitudinal section through the same,the closed, position of the knife-blade being indicated by dotted lines.Fig. 3 is a cross-section looking in the direction indicated by thearrows from the dotted line 3 3 in Fig. 2. Fig. 4: is a similar viewlooking in the direction indicated by the arrows from the dotted line 4;4 in Fig. 2, and Fig. 5 is a front end elevation.

In said drawings the portions marked 1 represent the handle of the tool,2 the knifeblade, and 3 the rubber.

The handle 1 is preferably of metal and hollow. It may be formed from ablank of appropriate form stamped from a sheet of metal and bent to theshape desired. In its front end is left an aperture of a form suitableto permit the knife-blade 2 to slide back and forth therein. At itsopposite end are formed two extensions 4, between which the rubbereraser is clamped, being held in place by inwardly-projecting brads 5,formed by suitable dies in the sides of said extensions near its upperedge, and is adapted to slide on said pin between said sides and affordthe blade a firm support when extended. A wheel 8 with serrated edge isjournaled on a shafts, near the lower side of the handle, near the endopposite to that through which the blade projects. An arm 9 is rigidlyattached thereto and extends forward toward the blade, to which it isconnected by a link 10, said link being hinged both to said arm and tosaid blade. Projecting from one side of said wheel and on one side ofits axis is a pin 11, and a fiat spring 12, attached at one end to thehandle, normally bears downward on said pin to hold said'wheel fromaccidentally turning.

In use when it is desired to use the blade it is thrown out into theposition shown by turning the wheel Swith the thumb or finger to throwthe arm 9 forward. As soon as the pin 11 has passed over the center thespring 12 will operate to turn said Wheel quickly until it reaches theposition shown in whole lines in Fig. 2, throwing out the blade andholding it in position for use until the Wheel is turned back, which isdone in the same manner, the spring operating to hold the blade againstbeing accidentally extended, as will be readily understood. When theblade is in the extended position, the pivot between the arm 9 and thelink 10 is slightly below a straight line, limited by a projectingfinger or rest 1, so that said bladeis secured against closing in underthe pressure of use. The upper front corner I) of the handle ispreferably formed with a smooth hard surface that can be used as aburnisher on the paper after the eraser has been used.

The rubber 3 is of any character or form desired and found suitable,being clamped between the ends 4 of the sides of the handle and securedin place by the brads 5, projecting thereinto, as will be readilyunderstood.

Modifications in the details of construction and arrangement may be madewithout departing from my invention, as will be readily understood.

Having thus fully described my said invention, what I claim as new,'anddesire to secure by Letters Patent, is

1. A combination-eraser comprising a hollow handle, a rubber secured inone end of said handle, a knife mounted to slide through an opening inthe other end, and means for throwing said knife out and in and holdingit positively in either position, substantially as set forth.

2. An eraser comprising a handle, a knifeblade mounted to slide throughan opening in one end of said handle, said blade having a shank whichfits in a way in said handle and affords support thereto, and a lever orswinging arm connected therewith for operating said blade out and in,substantially as set forth.

3. A11 eraser comprisinga handle, a knifeblade mounted to slidein a wayin said handle, a pivoted part having an arm projecting therefrom, alink pivoted to said arm and to said blade, and means for operating saidpivoted part, substantially as set forth.

4. An eraser comprising a handle, a blade mounted to slide out and inthrough an opening in said handle, the pivoted wheel and arm projectingtherefrom, a link connected to the blade and to the arm, and a springbearing against a part of said wheel to hold it against accidentallyturning, substantially as set forth.

5. An eraser comprising the hollow handle, the sliding blade mountedtherein, the wheel with an arm projecting therefrom, a projection on oneside of said wheel at one side of its axis, a link pivotally connectedto said arm and to said blade, and a spring bearing upon saidprojection, substantially as set forth.

In witness whereof I have hereunto set my hand and seal, at Tarrytown,New York, this 11th day of March, A. D. 1902.

RICHARD J. DRISOOLL.

Witnesses:

WILL W. CAMERON, THEO. S. BEERS.

